1.Protect your hearing from harmful noises,but also allow you to hear normal conversation.
2.Weak sounds can even be amplisfied,so you hear them better than you would electronic ear muffs.
3.Immediately attenuated the noises above 85 dB.
4.Soft,wide and foam ear cushions and individually headband provide an even and consistent distribution of pressure around the ears
5.Search the program automatically
6.Approved by EN352-1,EN352-4,CE,ROHS,FCC,ANSI,PAHs-free and so on.